Tyrone factored the polynomial completely. What is the value of B?12x4+30x3+4x2+10xAx(Bx2+1)(2x+5)

Factor by grouping: 12x⁴ + 30x³ + 4x² + 10x = 6x³(2x + 5) + 2x(2x + 5). Taking out the common factor gives 2x(3x² + 1)(2x + 5). Comparing this with Ax(Bx² + 1)(2x + 5), B is 3, so the correct choice is 3.

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